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    <a href="../index.html">cppreference.com</a> &gt; <a href=
    "index.html">C++ Double-ended Queues</a> &gt; <a href=
    "assign.html">assign</a>
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  <div class="name-format">
    assign
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  <div class="syntax-name-format">
    Syntax:
  </div>
  <pre class="syntax-box">
  #include &lt;deque&gt;
  void assign( <strong>size_type</strong> num, const <a href=
"../containers.html">TYPE</a>&amp; val );
  void assign( <a href=
"../iterators.html">input_iterator</a> start, <a href=
"../iterators.html">input_iterator</a> end );
</pre>

  <p>The assign() function either gives the current dequeue the values
  from <em>start</em> to <em>end</em>, or gives it <em>num</em> copies
  of <em>val</em>.</p>

  <p>This function will destroy the previous contents of the
  dequeue.</p>

  <p>For example, the following code uses assign() to put 10 copies of
  the integer 42 into a vector:</p>
  <pre class="example-code">
 vector&lt;int&gt; v;
 v.assign( 10, 42 );
 for( int i = 0; i &lt; v.size(); i++ ) {
   cout &lt;&lt; v[i] &lt;&lt; &quot; &quot;;
 }
 cout &lt;&lt; endl;            
</pre>

  <p>The above code displays the following output:</p>
  <pre class="example-code">
 42 42 42 42 42 42 42 42 42 42          
</pre>

  <p>The next example shows how assign() can be used to copy one vector
  to another:</p>
  <pre class="example-code">
 vector&lt;int&gt; v1;
 for( int i = 0; i &lt; 10; i++ ) {
   v1.push_back( i );
 }              

 vector&lt;int&gt; v2;
 v2.assign( v1.begin(), v1.end() );             

 for( int i = 0; i &lt; v2.size(); i++ ) {
   cout &lt;&lt; v2[i] &lt;&lt; &quot; &quot;;
 }
 cout &lt;&lt; endl;            
</pre>

  <p>When run, the above code displays the following output:</p>
  <pre class="example-code">
 0 1 2 3 4 5 6 7 8 9            
</pre>

  <div class="related-name-format">
    Related topics:
  </div>

  <div class="related-content">
    (C++ Strings) <a href="../cppstring/assign1.html">assign</a><br>
    <a href="insert.html">insert</a><br>
    <a href="push_back.html">push_back</a><br>
    <a href="push_front.html">push_front</a>
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